What is OSI model and layers of OSI model

OSI stands for Open System Interconnection. OSI model is a set of rules that makes communication between two systems. The data is transferred from one computer system to another by this set of rules that the OSI model defines. OSI model was developed by ISO (International Standard organization). The OSI model is divided into seven layers. The seven-layer concept was made by the work of Charles Bachman at [...]